Re: Problem with Electrohome G07- only half picture

I did pull that resistor out and tested it - it looked good, but I've been
thinking of replacing it anyway. Would anyone care to explain how the
vertical output circuit works in just a few words? Why would half the
screen go out? I would think that I'd just get a flat horizontal line if
the circuit failed.

thanks for the help.

Matt

----- Original Message -----
From: "Sean McLachlan" <sean@lithoflexo.com>
To: <rasterlist@vectorlist.org>
Sent: Monday, July 28, 2003 7:54 AM
Subject: RE: RASTER: Problem with Electrohome G07- only half picture

> You do if the monitor is mounted vertically. ;)
> I had a G07 that was doing the same thing, and one of the 400 series
> resistors was burnt open. I don't remember which one, it was so obviously
> fried I replaced it without much thought. Rogers R420 suggestion rings a
> bell, though.
>
> Sean McLachlan
> MIS Manager
> LithoFlexo grafics inc.
> 801.484.8503
>
> -----Original Message-----
> From: owner-rasterlist@vectorlist.org
> [mailto:owner-rasterlist@vectorlist.org]On Behalf Of SteveT
> Sent: Monday, July 28, 2003 8:58 AM
> To: rasterlist@vectorlist.org
> Subject: Re: RASTER: Problem with Electrohome G07- only half picture
>
>
> Matt
> If it displays the right half of the picture top to bottom -you do not
have
> a
> vertical problem.
>
> Matt Rossiter wrote:
>
> > Hey all,
> >
> > I brought home a Centipede that had a dead monitor. I replaced the caps
> and
> > installed a new HV unit. It now powers up, but only displays the right
> half
> > of the picture with a line running down the middle -looks like a typical
> xy
> > failure but on a raster game. So, basically I have a vertical
deflection
> > problem.
> >
> > Here's what I've done so far...
> >
> > 1) Tested the transistors in the vertical output circuit - X401 and
X402 -
> > they test fine out of circuit. I believe the signals are good too when
> > testing in circuit.
> > 2) FR401 (the fusible resistor) is fine.
> > 3) Checked the signals on IC 501 and they look good. Swapped in a new
IC
> > just to be sure.
> > 4) Checked other resistors and capacitors within the vertical output
> > circuit.
> >
> > I just can't seem to trace down the problem, but it could be something
> > simple I'm missing. Has anyone else run into a similar problem?
> >
> > Matt
> >
>
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Received on Mon Jul 28 12:54:54 2003